This quote is from Oscar Wilde's novel "The Picture of Dorian Gray." It is spoken by Lord Henry Wotton, a character who is known for his hedonistic and cynical views on life. In this passage, Lord Henry is discussing the nature of love and how it can be difficult to understand or explain. He argues that love is not something that can be easily defined or categorized, and that it is often a complex and multifaceted emotion.